“…The ability to impose bilateral symmetry underlies an increase in hierarchical complexity and higher cognitive abilities (Stout, ; Toth & Schick, ). Following technological types (like Middle Paleolithic tools, described in the archeological record after 385 ka; Scott & Ashton, ; Akhilesh et al, ) are generally made from retouched flakes or through prepared core technology (Levallois tools), and are particularly related with late Homo heidelibergensis , early Neanderthal, and archaic forms of H. sapiens (Toth & Schick, ). In this study, tool sample included 20 experimental lithic tools, belonging to different Lower Paleolithic morphotypes (choppers, handaxes, and flakes; see Table for length, width, thickness, and weight descriptive statistics).…”